65 lines
1.6 KiB
HTML
65 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="./intersection-observer-test-utils.js"></script>
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<style>
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#root {
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width: 200px;
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height: 200px;
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}
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#scroller {
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width: 160px;
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height: 200px;
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overflow-y: scroll;
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}
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#target {
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width: 100px;
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height: 100px;
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background-color: green;
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}
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.spacer {
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height: 300px;
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}
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</style>
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<div id="root">
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<div id="scroller">
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<div class="spacer"></div>
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<div id="target"></div>
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<div class="spacer"></div>
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</div>
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</div>
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<script>
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setup({message_events: [], output_document: window.parent.document});
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var entries = [];
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var root, scroller, target;
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runTestCycle(function() {
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root = document.getElementById("root");
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assert_true(!!root, "Root element exists.");
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scroller = document.getElementById("scroller");
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assert_true(!!scroller, "Scroller element exists.");
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target = document.getElementById("target");
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assert_true(!!target, "Target element exists.");
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var observer = new IntersectionObserver(function(changes) {
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entries = entries.concat(changes)
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}, {root: root});
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observer.observe(target);
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entries = entries.concat(observer.takeRecords());
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assert_equals(entries.length, 0, "No initial notifications.")
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runTestCycle(step1, "First rAF.");
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}, "IntersectionObserver in iframe with explicit root.");
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function step1() {
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scroller.scrollTop = 250;
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runTestCycle(step2, "scroller.scrollTop = 250");
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checkLastEntry(entries, 0, [8, 108, 308, 408, 0, 0, 0, 0, 8, 208, 8, 208, false]);
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}
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function step2() {
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checkLastEntry(entries, 1, [8, 108, 58, 158, 8, 108, 58, 158, 8, 208, 8, 208, true]);
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}
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</script>
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